1,3-cyclodecadiene-1-carboxylic acid, 6-[2-(2,5-dihydro-5-oxo-3-furanyl)ethyl]-6,7-dimethyl-10-methylene-, methyl ester, (1E,3Z,6R,7R)- 6,7-Dimethyl-10-methylene-6-[2-(5-oxo-2,5-dihydro-furan-3-yl)-ethyl]-cyclodeca-1,3-dienecarboxylic acid methyl ester InChI=1/C21H28O4/c1-15-8-9-16(2)21(3,12-10-17-13-19(22)25-14-17)11-6-5-7-18(15)20(23)24-4/h5-7,13,16H,1,8-12,14H2,2-4H3/b6-5-,18-7+/t16-,21+/m1/s methyl rel-(1E,3Z,6R,7R)-6,7-dimethyl-10-methylene-6-[2-(5-oxo-2,5-dihydrofuran-3-yl)ethyl]cyclodeca-1,3-diene-1-carboxylate